The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 12, 2003
Filed:
Dec. 12, 2001
Eric M. Gross, Rochester, NY (US);
Scott M. Silence, Fairport, NY (US);
Ralph A. Shoemaker, Rochester, NY (US);
Douglas A. Kreckel, Webster, NY (US);
Jean A. Maksymiak, Fairport, NY (US);
Raymond L. Mongeon, Rochester, NY (US);
Joseph A. Mastrandrea, Webster, NY (US);
R. Enrique Viturro, Rochester, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A toner maintenance system for an electrophotographic developer unit, including a sump for storing a quantity of developer material comprised of toner material; a first member for transporting developer material from the sump, a viewing window, in communication with toner material, in the sump; an optical sensor, for measuring reflected light off the viewing window and toner material, and generating a signal indicative thereof. A toner concentration controller is adapted to receive a signal from the optical sensor and to generate an “Add Toner” signal to replenish toner material in the sump.